Portable beverage cooler



FIG. 1 is a front view of a portable beverage cooler showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is bottom view thereof; and,

FIG. 7 is a perspective view thereof.

The dashed broken lines depict portions of the portable beverage cooler forming no part of the claimed design. 

CLAIM The ornamental design for a portable beverage cooler, as shown and described. 